Well, they'll work fine when the world actually starts warming

This article tells how Great Britain's reliance on wind farms has come back to bite the Brits:

Britain’s world lead in wind development is primarily because of two major natural advantages: Britain has the windiest conditions in Europe along with the longest continuous coastline. In short, if wind power can’t work in Britain it cannot work anywhere else. But fail it did yet again this winter. Indeed, as it has for most of the last 12 winters.

Figures released in early January showed that as temperatures plunged to well below freezing and electric power demand soared, electricity production at Britain’s 3,100+ wind turbines fell from an average of 8.6 percent of Britain’s electricity mix to just 1.8 percent. Instead of serving up to 3 million homes, wind farms were serving just 30,000 homes, a mere one-hundredth of normal capacity. On the evening of December 20 Britain’s average temperature fell to minus 5.6 celsius. At 6.30 that evening, the nation’s wind farms, which claim a generating capacity of 5.2 GW of electricity, were actually generating a piffling 40 MW, the equivalent of 20 turbines working at full capacity.